Determination of the spectroscopic stellar parameters for 257 field giant stars

Alves, S; Benamati, L; Santos, N. C; Adibekyan, V. Zh; Sousa, S. G; Israelian, G; Medeiros, José Renan de; Lovis, C; Udry, S

Determination of the spectroscopic stellar parameters for 257 field giant stars

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dc.contributor.author	Alves, S
dc.contributor.author	Benamati, L
dc.contributor.author	Santos, N. C
dc.contributor.author	Adibekyan, V. Zh
dc.contributor.author	Sousa, S. G
dc.contributor.author	Israelian, G
dc.contributor.author	Medeiros, José Renan de
dc.contributor.author	Lovis, C
dc.contributor.author	Udry, S
dc.date.accessioned	2020-05-31T20:20:39Z
dc.date.available	2020-05-31T20:20:39Z
dc.date.issued	2015
dc.description.resumo	The study of stellar parameters of planet-hosting stars, such as metallicity and chemical abundances, help us to understand the theory of planet formation and stellar evolution. Here, we present a catalogue of accurate stellar atmospheric parameters and iron abundances for a sample of 257 K and G field evolved stars that are being surveyed for planets using precise radial-velocity measurements as part of the Coralie programme to search for planets around giants. The analysis was done using a set of high-resolution and high-signal-to-noise Ultraviolet and Visible Echelle Spectrograph spectra. The stellar parameters were derived using Fe I and II ionization and excitation equilibrium methods. To take into account possible effects related to the choice of the lines on the derived parameters, we used three different iron line-list sets in our analysis, and the results differ among themselves by a small factor for most of stars. For those stars with previous literature parameter estimates, we found very good agreement with our own values. In the present catalogue, we are providing new precise spectroscopic measurements of effective temperature, surface gravity, microturbulence, and metallicity for 190 stars for which it has not been found or published in previous articles	pt_BR
dc.identifier.citation	ALVES, S. ; BENAMATI, L. ; SANTOS, N. C. ; ADIBEKYAN, V. Z. ; SOUSA, S. G. ; ISRAELIAN, G. ; MEDEIROS, J. R de. ; LOVIS, C. ; UDRY, S. . Determination of the spectroscopic stellar parameters for 257 field giant stars. Monthly Notices of the Royal Astronomical Society, v. 448, p. 2749-2765, 2015. Disponível em: https://academic.oup.com/mnras/article/448/3/2749/1110613. Acesso em: 26 Maio 2020. https://doi.org/10.1093/mnras/stv189 .	pt_BR
dc.identifier.doi	10.1093/mnras/stv189
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29103
dc.language	en	pt_BR
dc.publisher	Oxford University Press	pt_BR
dc.subject	Observational – techniques	pt_BR
dc.subject	Spectroscopic – catalogues – stars	pt_BR
dc.subject	Fundamental parameters – stars	pt_BR
dc.subject	Late-type	pt_BR
dc.title	Determination of the spectroscopic stellar parameters for 257 field giant stars	pt_BR
dc.type	article	pt_BR